Riveting tool



A. H. MORGAN RIVETING TOOL Feb. 2o, 1945.

F1ed Feb. 5, 1945 Qq "M lNvENToR @Zeffj 77Z0gfgz7z ATToRNEYa.

eatenred Feb. 2o, 194s H UNYFEIl@-A PATENT` OFFICE 1 Y i 2,369,910 A :riverine TooL Albert mMorgan, Williamsyillc, N.y Y'. .Application February 5, 1943, serial No. 474,838

This invention rela-tes to improvements in tools for applying tubular rivets of the kind yliewing internally th'readedbores so-=that they maybe detachably connectedv to said tools and thel lat ter thereupon actuated; to draw theends oi? the Shanks of the rivets toward thev pre-formed heads and byrsuch shortening operation effect the desired; expansion of the Shanks.` i l.Tools Afor the purposed'escribed, altlioughnot limited to such-'useyareadapted particularly fo-r-v operations wherein the parts to be riveted enlclose the' Shanks ofthe rivets in `suoli a man-ner that, being inaccessible, they carin-ot be expanded One objectoi the inventioni's'aftool which e so designedthat the connectionof the threaded steml to, rand its disconnection from, the rivets` may beeiected rapidly and with a- -milnfimumoi effort, this objectlcontemplatihgthe construction of the .tool insuchamanne-n that the direction ofi the forcewhich isI exerted in turning the threaded stem to disconnectit vtrema -riveauponA comple.

, tion off the. expanding'operation willfibe along' aline collinearwith' the axis. of the.- stem and hence- Will, not impair the riyetrconnecti'on. orfwear expassively, or .breakJhe sten-i..y i

A fur-ther Objectis to :provide for'faciiity in. re

moving and replacingl ther .threaded stem in the. event that: the latter" shouldbe; broken orl become wornto sucha degree as torno, longer-be serv-ice able,v" -A still further object is ancrer design and: ar.:

rangement of the :parte:y o f the took; whereby tto.

obtainv simplicity 1in. construction and ease and speed in .oper-.aiuola AThe Vinvention-is .illustrated in the accompany ingv drawing in which;

,Figurey k1 ,is/a sideelevaticnal Yviewioi. a tool-.fA

embodying .the-features. of the inventiono Figure 2y is a front-end elevation ofk the; too-1.A FiguresA 3, 4, 6y 'l and. `8- :are .enlareed transil 'verse sectionsA taken, along; lines 3%3, l5.--5-,.

6 6, 'I-'I .and -lrespectiyelp of. Figure 1.

Figure. 9 vis aneniarged sectional View ill-usr4 trating the positions. of the: attuatirrggV lever and, tltilrelxaded stem upon, completion of.i the expanding; s o e. i l

which is formed with diametrically opposed, longitudinally extending slots I3.- The latter provide guideways for opposed pins' I4 which are carried by a sleeveA I5 and? which are located in, but at opposite sidesy of, the helical groove of a screw `I6, the sleeve I5v being adapted to provide a handheld and being slidable along the barrel If2 in one direction to rotate the screw I6- clockwise and being slidable 'in the opposite direction to rotate the screw counterclockwise. The limits of the range of movement of the sleeve I5 are determined by the location of the ends of the slots I3. y

The screw I6,which is preferablysubstantially smaller inv diameter than the internal diameter of the barrel, isfsupportecl` inconcentric relation with the'barrel b-y a vbearing sleeve I7 which is located 'Within the barrel and which i's formed with opposed openings I8 through which the pins .I4-pass.' The sleeve Ifl is adapted to be moved' by and with the sleeve -I5 and servest'o vprovide a bea-ring of relatively' smalllarea which isalways located opposite the points at which the pins I4 1 are acting against the Walls of the spiral groove of the screw' I6. Turningresistance is thus refv duced to-a minimum.- `The opposite enel of the screw is connected to, and is supportedcoaxially of the barrel, by a coupling I9. The latterY is in the iform of ya plunger and at its inner end is formed with a transverse-slot 20 vfor accommodating a rectangularly-shaped extension v2'I of the screw, the extensionbeing' secured in the slot; 20 by a pin v22. -Atvits outer enel? the coupling I9 is formed' witha socket '2*3 for accommodating the. shank 24of a stem 215', theshank being secured inthe socket by a cross-pin 23 and the outer endl of the stemv being threaded. Rotary movements ofthe screw I6 will, therefore; he

transmitted to the stem by they coupling i9.

A head 21' -Which'is suitably secured inu the adk jacent end ofthe barrel lf2 isfformed with an axialv for the enlarged shank' of the stem while the re! The roar, as illustrated, includes a'ybarreiiz 5s bore 28 for aeoormnuod-'atirigy the stem 2'5. The enlarged ini- 1er end ofthe bore vprovides a guideduced outer end oi the bore is large enough to accommodate, with suitablepclearance the reduced outer endl; of the stem, thesaidf head tapering-in the direc-tion of its outer er-rd and term-inating ina iiat annular wall", or seat, which sur# rounds.y the stemv '2.5i The'. headE ZfT constitutes areaction member onanvil.

In order to retract the s'tem 25- a lever 29- is pivotally mounted upon a 'lug '3fm which is carried by the barrelA I2=inl thefvicinity of the head' 213, the outer ends of a tubular element 3|, which is carried by the lug and which extends transversely of the barrel, providing pivots to which lateral extensions on the lever are connected. Opposed pins 32 which are carried by the same extensions project through slots 33 in the barrel and have terminal portions which are located in an annular channel 34 formed in the coupling I9. Normally the lever 29 is held in the extended position shown in Figure l by a spring 35 which is held in place between the barrel and the lever by suitable projections, one formed on the barrel and one on the lever. By depressing the lever (moving it toward the barrel against the action of the spring 35) the coupling I9 will be actuated to retract the stem 25 a predetermined distance, the spring 35 being automatically operative to restore the lever, and hence the stem, to its original position when the lever is released.

It will thus be apparent that by moving the sleeve I toward the head 21 the screw I5 will be rotated in a clockwise direction, such movement being transmitted by the coupling I9 to the stem 25, that by moving the sleeve I5 in the opposite direction the screw I6, and hence the stem, will be rotated in a counterclockwise direction, and that by depressing the lever 29 the coupling I9 may be moved axially to retract the stem.

A` tubular rivet of the type for which the tool is designed is indicated at 36 (Figure 1). It is provided with a pre-formed head 31 in the form of an annular flange and the bore is reduced and threaded at its inner end and is enlarged in the vicinity of the head to weaken the wall of this portion of the shank. In applying the rivet it is held between the thumb and a finger of the operator so that threaded end of the stem 25 will enter and engage the threaded section of the bore of the rivet, the head end of the tool resting in the palm of the same hand. The sleeve I5, which is normally located at the outer end.

of the barrel I2, is grasped by the other hand and is moved along the barrel toward the head of the lIl the bore 28. Clearance is thus made between the barrel and the lever so that the sleeve I5 may be again fully clasped and moved along the barrel in the opposite direction. During this final movement of the sleeve the screw I6 is turned in a di rection such that its movement will unscrew the stem and thereby disengage it from the rivet, all parts being restored to their original positions upon completion of this operation.

The securement of thehead21 inthe adjacent end of the barrel l2 is such as to permit its removal from the barrel in order to enable a worn stem 25 to be removed and a new one substituted. For thus securing the head 21 any suitable means may be employed, for example, a screw fastening as shown. The removal of a worn stem 25, in

' addition to the removal of the head 21, requires the removal of the cross-pin 25. For this purpose openings 4I are formed in the barrel I2 in alignment with the cross-pin. 25 when the leading end of the shank stem 25 abuts the shoulder at the juncture of the enlarged and reduced portions of the bore 28. Ready access is thus provided to tool. During such movement, the rivet being held I stationary and in proper alignmentwiththe stem, the latter-is screwed into the threaded section of the bore. Preferably the stem 25, when in its normal position, extends beyond the seat on the head 21 such a distance that whenv the desired number of threads in the rivet have been engaged the head of the rivet abuts or is loctaed in close proximity to such seat. The tool may then be manipulated to insert the rivet through the parts 38 and 39 (Figure 9), or part, to which the rivet is to be applied, and while thehead of the rivet is held against the part 38 the lever 29 is depressed to retract the stem 25. During this movement of the stem the head of the tool holds the pre-formed head of the rivet against the part 3B While the threaded section of the shank is drawn toward the pre-formed head. The weakened portion of the rivet shank is thereby expanded as indicated at 49 to form an annular enlargement which engages the wall 39, the final part of the retractory movement of the stem increasing to the desired degree the pressure with which the engaged parts are held between the pre-formed head and the enlargement 40. The riveting operation being completed, the lever 29 is released. Thereupon the spring is operative to restore the cross-pin. Upon the removal of the head 21 and the Worn stem 25, the shank 24 of the substituted stem is inserted in the socket 23 and secured by the cross-pin which is inserted through one of the openings 4I. Thereupon the head 2'! is inserted in the inner end of the barrel I2 and secured by its fastening means. The substitution of a new stem is thus an operation which calls for very slight labor and effort and which can be easily accomplished in a few moments of time.

From the foregoing it will be apparent that the sleeve I5 and screw I6 provide a high-speed drive for the stem 25. The screwing of the stem into a rivet preparatory to the expanding operation and the unscrewing of the stem upon completion of this operation are effected by relatively short strokes of the sleeve,.a single stroke for each operation. Preferably the parts `are so designed that only a portion of the permissible stroke of the sleeve I5 toward 4the head 21 is required to obtain the desired connection between the stem and a rivet, said sleeve at the completion' of such partial stroke being so located with respect to the lever 29 that the hand `in which -the sleeve is clasped may be opened so thatthe thumb and palm may be'readily. moved to include the free end of the lever. The handhold provided by the sleeve, therefore, is employed inv eiecting both rotary and axial movements of the stem 25 and serves as a guard to prevent contact between the hand which is employed in operating the lever 29 y and the edges of the slots I3. In this connection the lever to its open, extended position, the barrel I2 being pushed axially away from the head of the rivet until the leading end of the shank of the stem 25 is engaged by the shoulder at the juncture of the enlarged and reduced portions of it will be noted that the movement of the sleeve I5 toward the outer end of the b'arrel to disconnect the stem lfrom a rivet afterv completion of the expanding operation must, of necessity, occur when ther rivet is xed to the riveted part, or parts, and when any movement'of the stem 25 except along a line collinear with the axis of the rivet will be objectionable because of the tendency to loosen the rivet or impair the connection, because of the resultant excessive wearing action to which the threads of the stem will be subjected, and because of the possibility of breaking the stem. The construction describedyavoids all oi' these objections as the force required to turn the stem 25 is applied to the` sleeve I5 along a line coaxial with the screw, and hence along a line which is collinear with the axis of the rivet. In other words in moving the sleeve I5 toward the outer end of the barrel I2 the forcewhich isV employed naturally tends to take the direction required to effect disconnection of `the stem and rivet in the desired manner. f

I claim as my invention:

l, In a tool for applying tubular rivets, in comtion threaded to engage the threads of a tubular rivet, a longitudinally-extending screw rotatably mounted within the barrel, a coupling member rotatably mounted within the barrel as arctatilon transmitting connection between the screw and the element, a removable fastening connecting the coupling member and thev element, an actuating sleeve mounted upon the barrel for co-axial movement, the barrel having a longitudinal slot, a projection carried by the sleeve and extending through the slot into engagement with the operating screw whereby the movement of the sleeve will effect the rotation of thescrew, the

' barrel having an external projecting lug, a springloaded lever pivotally connected to thelug, pins carried by the lever at one side of itspivot and serving to transmit the movement of the lever to the coupling member, the barrel having slots through which the pins project and the coupling member being slidable within the barrel and having an annular groove in which the pins engage, the coupling member being movable to a position relative to the barrel in which, the screw and coupling member-remaining within the barrel as a support, the removable fastening'between the coupling member and the element is externally accessible for removal, thereby to enable the removal and replacement of the element.

2. In a tool for applying tubular rivets, in combination: an elongated barrel having at its forward end a head constituting a reaction member or anvil and provided 'with a central co-axial opening, an element rotatably mounted in said opening and having an externally projecting portion threaded to engagethe threads of a tubular rivet, a longitudinally-extending screw rotatablyr mounted within the barrel, a coupling memberro-I tatably mounted within the barrel as a rotation transmitting connection between the screw and the element, a removable fastening connecting the coupling member and the element, an actuating sleeve mounted upon the barrel for co-axial movement, the barrel'having a longitudinal slot, a projection carried by the sleeve and extending through the slot into engagement with the operatingscrew whereby the movement of the sleeve will effect the rotation ofthe screw, the barrel having an external projecting lug, a springloaded lever pivotally connected to the lug, pins carried by the lever atone side of its pivot and serving to transmit the movement of the lever to the coupling member, the barrel having slots through which the pins project and the coupling member being slidable within the barrel and having an annular groove in which the pins engage, the barrel having an opening near its front end and the removable connection ybetween the elementand the coupling member registering, with saidfopening in the advanced positidn of the coupling member, such registry enabling external access to the removable connection `for the purpose of its removal and replacement.

3. In a toolfor applying tubular rivets, vin combination; an elongated barrel having at its forward end a head constituting a reaction nember or 'anvil and provided with a central co-axial opening, an element rotatably mounted in said opening and having an externally projecting portion threaded to engage the threads of a tubular rivet, a longitudinally-extending screw rotatably mounted within the barrel, a coupling member rotatably mounted Within the barrel as a rotation transmitting connection between the screwand the element, a removable fastening connecting the coupling member and the element, .an'actuating sleeve mounted upon the barrel f'or co-axial movement, the barrel having a longitudinal slot,.-

a projection carried by the sleeve and extending through the slot into engagement with the 4operating screw whereby the movement of the sleeve will effect the rotation of the screw, a tubular bearing mounted within the barrel and surrounding and supporting the screw, the said projection carried by the sleeve extending through the tubular bearing whereby the bearing is movable lengthwise of the barrel with said sleeve, the barrel having an external projecting lug, a springloaded lever pivotally connected to the lug, pins n carried by the lever at one side of its pivot and serving to transmit the movement of the lever to the coupling member, the barrel having slots through which the pins project and the coupling member being slidable within the barrel and having an annular groove in which the pins engage,

the coupling member being movable to ay position relative to the barrel in which, the screw and coupling member remaining within the barrel as a support, the removable fastening between the coupling member and the element is externally accessible for removal, thereby to enable the' removal and replacement of the'element.

ALBERT H. MORGAN. 

